Disorder Driven Destruction of a Phase Transition in the Vortex System of a Superconductor

N. K. Wilkin; Henrik Jeldtoft Jensen

doi:10.1103/PhysRevLett.79.4254

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Disorder Driven Destruction of a Phase Transition in the Vortex System of a Superconductor

N. K. Wilkin, Henrik Jeldtoft Jensen

DOI 10.1103/PhysRevLett.79.4254 · Physical Review Letters

T1

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Abstract

We investigate the effects of point disorder on the magnetically induced vortex system of a layered superconductor. The clean system is known to have a first order phase transition which is clearly identified by a sharp peak in the specific heat. The peak is lost abruptly as the strength of the disorder is increased. Hence, for strong disorder there is no phase transition (in the vortex degrees of freedom) as a function of temperature but merely a crossover which is still detectable in the I-V characteristic.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown